trailer over a tree root in the trail, it oscillates with a period of $2\mathrm{.}14s.$ Determine the following.

$($a$)$ force constant of the springs

$\frac{N}{m}$

$($b$)$ mass of the trailer

$kg$

$($c$)$ frequency of the oscillation

$Hz$

$($d$)$ time it takes for the trailer to bounce up and down $10$ times

$s$